题目内容
（请给出正确答案）
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“Sampling a continuous-time signal at a sampling period T to obtain a discrete-time signal”相关的问题
此题为判断题(对，错)。
A、The shorter the sampling interval, the better
B、The sampling frequency must be greater than or equal to the maximum freqeuncy times two
C、It is not neccesary that the sampled signal contains all the information of the continuous-time signal
D、Discretization in the time domain corresponds to periodization in the frequency domain
B．A sampling method which involves having a constant sampling interval, the starting point for testing is determined randomly．
C．A sampling method in which the auditor selects a block of contiguous items from within the population．
D．Testing items with a certain characteristiC．
B．They both need a sampling frame of each of the subgroups of the target population.
C．In both of them,researchers want to ensure that all strata are included in the sample in order to enhance the representativeness of the sample and/or to enable comparisons between strA
D．Stratified sampling does not need a sampling frame to generate a stratified sampl
E．
E．In both of them,once the sample number of each subgroup is defined,samples are drawn in simple random sampling or systematic sampling metho
D．
1. With regard to the sampling, there were a limited number of students in the 15- to 18-year age range because fewer referrals of this age group were made to sleep centers and psychologists. There were a limited number of participants from the hospital samples who were diagnosed with ARC, DSPS, or RLS in this initial study, necessitating further validation studies with larger sample sizes. Furthermore, the recent changes in diagnostic criteria for OSAS and PLMD in children require further validation studies with larger sample sizes using these new hospital diagnostic criteria.
A、Revisiting previous sections or key results
B、Relating the study results to those of existing research
C、Specifying Achievements/Contributions & Implications
D、Identifying Limitations/ Suggesting Future work & Applications
A. work sampling and elemental time study methods
B. gross time study and work sampling methods
C. only elemental time study method
B．Quota sampling
C．Simple random
D．Convenienc
E．Cluster
A、ineffective use of audit procedures
B、testing less than the entire population
C、use of extensive tests of controls
D、use of random sampling
A、Simple random sampling
B、Systematic sampling
C、Stratified sampling
D、All of the above are methods of probability sampling.
警告：系统检测到您的账号存在安全风险
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
